How oil is formed

Oil, natural gas and coal are known as fossil fuels. They are extremely useful substances and humans spend lots of time and energy to extract them from the earth. But why are they called fossil fuels, when and how did they form? In an town or village in Ireland on a cool evening there is… Continue reading How oil is formed

The geological history of the earth

To understand the past, we divide history into different pieces, some big, some small. Human history has been divided into Ages, (e.g. Stone Age, Bronze Age) then smaller periods like Dynasties, then by the reigns of single rulers. Geologists deal with much longer periods of time, but they divide the history of the Earth in… Continue reading The geological history of the earth